Wednesday 11 April 2012

Consciousness of self weight is important for weight loss


Do we have a real perpception of our weight? Do we know if we are really overweight or not? This is what researchers at the University of Illinois investigated when they surveyed over 3,500 college applicants, as part of the Up Amigos project, a collaboration with the Mexican Universidad Autónoma de San Luis Potosi. More than a third couldn't report their weight accurately, and overweight and obese men were more likely to underestimate their weight than women. 


In contrast to what one would thought, almost half of the male volunteers underestimated their weight. Females were more realistic, as 21.2% believed that they were overweight when 27.8% of women were actually overweight or obese. This is even more worrying in the adolescence. According to figures released by the Centers for Disease Control and the International Journal of Pediatric Obesity, American teens are even less likely to report their weights correctly.

Very few participants in the Mexican study overestimated their weight, but those who did were most often female, younger, had parents with less education, and watched more television. Ideal body image changes with exposure to Western media, the researchers noted. The curvier female figure once appreciated in Latino culture is being replaced by the ultra-thin ideal promoted by Western advertisers.

Genes that can increase the risk of childhood obesity


The Center for Applied Genomics at The Children's Hospital of Philadelphia declare tha they have identified and characterized a genetic predisposition to common childhood obesity. The meta-analysis, by an international collaborative group, the Early Growth Genetics (EGG) Consortium, was published in Nature Genetics, and included 14 previous studies encompassing 5,530 cases of childhood obesity and 8,300 control subjects, all of European ancestry.



Previous studies had identified gene variants contributing to obesity in adults and in children with extreme obesity, but relatively little is known about genes implicated in regular childhood obesity. The study team identified two novel loci, one near the OLFM4 gene on chromosome 13, the other within the HOXB5 gene on chromosome 17. Both loci presented associactions with adult and extreme childhood obesity. However, none of the genes were previously implicated in obesity and although it is known they have functions in the intestine, their precise functional role in obesity is currently unknown.

Source: http://www.ncbi.nlm.nih.gov/pubmed/22484627